make a .jpg or .bmp picture into a widget...?

[mynahz]

Hi JimDaniel,
I have tried using your example but why do I get errors like this?

src\blinkingicon.cpp:4: error: new types may not be defined in a return type
src\blinkingicon.cpp:4: note: (perhaps a semicolon is missing after the definition of `BlinkingIcon')
src\blinkingicon.cpp:4: error: return type specification for constructor invalid
src\blinkingicon.cpp:10:35: warning: unknown escape sequence '\H'
mingw32-make[1]: *** [build\host\blinkingicon.o] Error 1
mingw32-make: *** [release] Error 2

src\blinkingicon.cpp:4: error: new types may not be defined in a return type
src\blinkingicon.cpp:4: note: (perhaps a semicolon is missing after the definition of `BlinkingIcon')
src\blinkingicon.cpp:4: error: return type specification for constructor invalid
src\blinkingicon.cpp:10:35: warning: unknown escape sequence '\H'
mingw32-make[1]: *** [build\host\blinkingicon.o] Error 1
mingw32-make: *** [release] Error 2

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The actual code i used is exactly the same as what you have given me, only difference is just that i split it into a .h and a .cpp... like this...

#ifndef __BLINKINGICON_H__
#define __BLINKINGICON_H__
 
#include <QWidget>
#include <QLabel>
 
class BlinkingIcon : public QWidget
{
	Q_OBJECT    
 
	public:         
		BlinkingIcon(QWidget * parent = 0);         
		virtual ~BlinkingIcon();
 
	private:        
		QLabel * display_image;
}
 
 
#endif // __BLINKINGICON_H__

#ifndef __BLINKINGICON_H__
#define __BLINKINGICON_H__

#include <QWidget>
#include <QLabel>

class BlinkingIcon : public QWidget
{
	Q_OBJECT    
	 
	public:         
		BlinkingIcon(QWidget * parent = 0);         
		virtual ~BlinkingIcon();
		
	private:        
		QLabel * display_image;
}


#endif // __BLINKINGICON_H__

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#include "blinkingicon.h"
 
BlinkingIcon::BlinkingIcon(QWidget * parent) 
			: QWidget(parent)
{
	this->setWindowTitle(tr("My Blinking Icon"));    
	this->resize(200, 200);
 
	display_image = new QLabel(this);   
	display_image->setPixmap(QPixmap("C:\HmiProject\test\nyjc.bmp"));   
	display_image->adjustSize();
}
 
BlinkingIcon::~BlinkingIcon(){}

#include "blinkingicon.h"

BlinkingIcon::BlinkingIcon(QWidget * parent) 
			: QWidget(parent)
{
	this->setWindowTitle(tr("My Blinking Icon"));    
	this->resize(200, 200);
	
	display_image = new QLabel(this);   
	display_image->setPixmap(QPixmap("C:\HmiProject\test\nyjc.bmp"));   
	display_image->adjustSize();
}

BlinkingIcon::~BlinkingIcon(){}

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Once again, thanks for your patient help given.

Hi wysota,
pardon me for my ignorance, but what does it mean by "The main difference is that a tristate QCheckBox has an indeterminate state." from the website? Is the example using an existing class QCheckBox, and giving it more functions to act as an indicator? the code... does it mean that the QCheckBox named indicator has a function indeterminateressed? I am having difficultity understanding the codes... Can you explain briefly?

QCheckBox::indicator:indeterminate:pressed {
             image: url(:/images/checkbox_indeterminate_pressed.png);
         }

QCheckBox::indicator:indeterminate:pressed {
             image: url(:/images/checkbox_indeterminate_pressed.png);
         }

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Thanks!!

[jacek]

The compiler has already suggested what's wrong:

src\blinkingicon.cpp:4: note: (perhaps a semicolon is missing after the definition of `BlinkingIcon')

[mynahz]

i actually tried putting the semicolon but the error still resides...

and when i start another project and did the same thing, i actually get another set of errors!
let me show u all my codes in the whole project..
here is the main.cpp...

#include <QApplication>
 
#include "BlinkingIcon.h"
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    BlinkingIcon picIcon;
    picIcon.show();
    return app.exec();
}

#include <QApplication>

#include "BlinkingIcon.h"

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    BlinkingIcon picIcon;
    picIcon.show();
    return app.exec();
}

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next is the blinkingicon.h...

#ifndef __BLINKINGICON_H__
#define __BLINKINGICON_H__
 
#include <QWidget>
#include <QLabel>
 
class BlinkingIcon : public QWidget
{
	Q_OBJECT
 
	public:
		BlinkingIcon(QWidget *parent = 0);
		virtual ~BlinkingIcon();
 
	private:
		QLabel * display_image;
}
 
#endif	//__BLINKINGICON_H__

#ifndef __BLINKINGICON_H__
#define __BLINKINGICON_H__

#include <QWidget>
#include <QLabel>

class BlinkingIcon : public QWidget
{
	Q_OBJECT
	
	public:
		BlinkingIcon(QWidget *parent = 0);
		virtual ~BlinkingIcon();
		
	private:
		QLabel * display_image;
}

#endif	//__BLINKINGICON_H__

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following which, is the blinkingicon.cpp...

#include "BlinkingIcon.h"
 
BlinkingIcon::BlinkingIcon(QWidget * parent)
			: QWidget(parent)
{
	this->setWindowTitle(tr("My Blinking Icon"));
	this->resize(200,200);
 
	display_image = new QLabel(this);
	display_image->setPixmap(QPixmap("C:\HmiProject\blinkingIcon\sprites\ship\ship0000.png"));
	display_image->adjustSize();			
}
 
BlinkingIcon::~BlinkingIcon(){}

#include "BlinkingIcon.h"

BlinkingIcon::BlinkingIcon(QWidget * parent)
			: QWidget(parent)
{
	this->setWindowTitle(tr("My Blinking Icon"));
	this->resize(200,200);
	
	display_image = new QLabel(this);
	display_image->setPixmap(QPixmap("C:\HmiProject\blinkingIcon\sprites\ship\ship0000.png"));
	display_image->adjustSize();			
}

BlinkingIcon::~BlinkingIcon(){}

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the new set of errors i am getting now is...

src\main.cpp:7: error: new types may not be defined in a return type
src\main.cpp:7: note: (perhaps a semicolon is missing after the definition of `BlinkingIcon')
src\main.cpp:7: error: extraneous `int' ignored
src\main.cpp: In function `BlinkingIcon qMain(int, char**)':
src\main.cpp:11: error: invalid conversion from `int' to `QWidget*'
src\main.cpp:11: error:   initializing argument 1 of `BlinkingIcon::BlinkingIcon(QWidget*)'
src\main.cpp: In copy constructor `BlinkingIcon::BlinkingIcon(const BlinkingIcon&)':
../../HMIDeveloper/Qt/include/QtGui/../../src/gui/kernel/qwidget.h:720: error: `QWidget::QWidget(const QWidget&)' is private
src\main.cpp:11: error: within this context
src\main.cpp: In function `BlinkingIcon qMain(int, char**)':
src\main.cpp:11: error:   initializing temporary from result of `BlinkingIcon::BlinkingIcon(QWidget*)'
mingw32-make[1]: *** [build\host\main.o] Error 1
mingw32-make: *** [release] Error 2

src\main.cpp:7: error: new types may not be defined in a return type
src\main.cpp:7: note: (perhaps a semicolon is missing after the definition of `BlinkingIcon')
src\main.cpp:7: error: extraneous `int' ignored
src\main.cpp: In function `BlinkingIcon qMain(int, char**)':
src\main.cpp:11: error: invalid conversion from `int' to `QWidget*'
src\main.cpp:11: error:   initializing argument 1 of `BlinkingIcon::BlinkingIcon(QWidget*)'
src\main.cpp: In copy constructor `BlinkingIcon::BlinkingIcon(const BlinkingIcon&)':
../../HMIDeveloper/Qt/include/QtGui/../../src/gui/kernel/qwidget.h:720: error: `QWidget::QWidget(const QWidget&)' is private
src\main.cpp:11: error: within this context
src\main.cpp: In function `BlinkingIcon qMain(int, char**)':
src\main.cpp:11: error:   initializing temporary from result of `BlinkingIcon::BlinkingIcon(QWidget*)'
mingw32-make[1]: *** [build\host\main.o] Error 1
mingw32-make: *** [release] Error 2

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I don't quite get it... line 7 of main.cpp is a "{", no BlinkingIcon definition until line 9... as for line 11 i tried changing the return type to "int" type by "int(app.exec() )" but it also doesn't work. another thing i tried was to put "QWidget main(int argc, char *argv[])" or "void main(int argc, char *argv[])" instead of "int main(int argc, char *argv[])" but it doesn't help either.
As for the other errors at line 11 (regarding qMain), I am totally lost.
Hope you guys can enlighten me... Thanks loads!!!

[JimDaniel]

Try putting a semi-colon after the BlinkingIcon class defintion, in your header file. I was getting compile errors with the code until I did that. Now it works fine.

[wysota]

pardon me for my ignorance, but what does it mean by "The main difference is that a tristate QCheckBox has an indeterminate state." from the website?

It means the checkbox can be checked, unchecked or "partially checked".

[mynahz]

Try putting a semi-colon after the BlinkingIcon class defintion, in your header file. I was getting compile errors with the code until I did that. Now it works fine.

Hi JimDaniel,
Do you mind posting your code here for me to compare? because I did what you did too, but I am still stuck. I show you orig. and edited (add semicolon after BlinkingIcon) here and their error messages...

#ifndef __BLINKINGICON_H__
#define __BLINKINGICON_H__
 
#include <QWidget>
#include <QLabel>
 
class BlinkingIcon : public QWidget
{
	Q_OBJECT
 
	public:
		BlinkingIcon(QWidget *parent = 0);
		virtual ~BlinkingIcon();
 
	private:
		QLabel * display_image;
}
 
#endif	//__BLINKINGICON_H__

#ifndef __BLINKINGICON_H__
#define __BLINKINGICON_H__

#include <QWidget>
#include <QLabel>

class BlinkingIcon : public QWidget
{
	Q_OBJECT
	
	public:
		BlinkingIcon(QWidget *parent = 0);
		virtual ~BlinkingIcon();
		
	private:
		QLabel * display_image;
}

#endif	//__BLINKINGICON_H__

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for this, error messages are as follows:
src\main.cpp:7: error: new types may not be defined in a return type
src\main.cpp:7: note: (perhaps a semicolon is missing after the definition of `BlinkingIcon')
src\main.cpp:7: error: extraneous `int' ignored
src\main.cpp: In function `BlinkingIcon qMain(int, char**)':
src\main.cpp:11: error: invalid conversion from `int' to `QWidget*'
src\main.cpp:11: error: initializing argument 1 of `BlinkingIcon::BlinkingIcon(QWidget*)'
src\main.cpp: In copy constructor `BlinkingIcon::BlinkingIcon(const BlinkingIcon&)':
../../HMIDeveloper/Qt/include/QtGui/../../src/gui/kernel/qwidget.h:720: error: `QWidget::QWidget(const QWidget&)' is private
src\main.cpp:11: error: within this context
src\main.cpp: In function `BlinkingIcon qMain(int, char**)':
src\main.cpp:11: error: initializing temporary from result of `BlinkingIcon::BlinkingIcon(QWidget*)'
mingw32-make[1]: *** [build\host\main.o] Error 1
mingw32-make: *** [release] Error 2

for the edited version,

#ifndef __BLINKINGICON_H__
#define __BLINKINGICON_H__
 
#include <QWidget>
#include <QLabel>
 
class BlinkingIcon :: public QWidget
{
	Q_OBJECT
 
	public:
		BlinkingIcon(QWidget *parent = 0);
		virtual ~BlinkingIcon();
 
	private:
		QLabel * display_image;
}
 
#endif	//__BLINKINGICON_H__

#ifndef __BLINKINGICON_H__
#define __BLINKINGICON_H__

#include <QWidget>
#include <QLabel>

class BlinkingIcon :: public QWidget
{
	Q_OBJECT
	
	public:
		BlinkingIcon(QWidget *parent = 0);
		virtual ~BlinkingIcon();
		
	private:
		QLabel * display_image;
}

#endif	//__BLINKINGICON_H__

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and the error messages are...
src\BlinkingIcon.h:7: error: expected identifier before "public"
src\BlinkingIcon.h:7: error: expected unqualified-id before "public"
src\main.cpp: In function `int qMain(int, char**)':
src\main.cpp:9: error: `BlinkingIcon' was not declared in this scope
src\main.cpp:9: error: expected `;' before "picIcon"
src\main.cpp:10: error: `picIcon' was not declared in this scope
src\main.cpp:9: warning: unused variable 'BlinkingIcon'
src\main.cpp:10: warning: unused variable 'picIcon'
mingw32-make[1]: Leaving directory `C:/HmiProject/blinkingIcon'
mingw32-make[1]: *** [build\host\main.o] Error 1
mingw32-make: *** [release] Error 2

[jacek]

Do you mind posting your code here for me to compare? because I did what you did too, but I am still stuck.

":" is called colon, a semicolon is ";" and you are supposed to put it in line #17 of that code snippet.

[JimDaniel]

#ifndef __BLINKINGICON_H__
#define __BLINKINGICON_H__
 
#include <QWidget>
#include <QLabel>
 
class BlinkingIcon : public QWidget
{
	Q_OBJECT
 
	public:
		BlinkingIcon(QWidget *parent = 0);
		virtual ~BlinkingIcon();
 
	private:
		QLabel * display_image;
};
 
#endif	//__BLINKINGICON_H__

#ifndef __BLINKINGICON_H__
#define __BLINKINGICON_H__

#include <QWidget>
#include <QLabel>

class BlinkingIcon : public QWidget
{
	Q_OBJECT
	
	public:
		BlinkingIcon(QWidget *parent = 0);
		virtual ~BlinkingIcon();
		
	private:
		QLabel * display_image;
};

#endif	//__BLINKINGICON_H__

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